Question
The relative lowering of vapour pressure produced by dissolving 71.5 g of a substance in 1000 g of water is 0.00713. The molecular weight of the substance will be
Answer: Option A
:
A
△P1P01=n2n1+n2≈n2n1=W2/M2W1/M1
M2=W2×M1W1×(△P1P01)=71.5×181000×0.00713=180.5g/mole
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A
△P1P01=n2n1+n2≈n2n1=W2/M2W1/M1
M2=W2×M1W1×(△P1P01)=71.5×181000×0.00713=180.5g/mole
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